Last name Prothero (Prothero 
) , all around the world, is quite a rare family name. The cognomen Prothero is characteristic of the United Kingdom, where it is quite a rare surname, Australia, where it is a rare surname, and the United States.
| VARIANT | COUNTRY |
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| Prothero | Canada, Australia, United States, United Kingdom, South Africa |
| thomas prothero British businessman (1780-1853), GB (b. 1780) |
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g. w. prothero British historian, GB (b. 1848) |
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| george prothero Welsh cricketer and cleric (1818-1894), GB (b. 1818) |
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| arthur william edward prothero (1850-1931) (b. 1850) |
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| michael eruli du santoy prothero (1856-1923) (b. 1856) |
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| emma mildred prothero Peerage person ID=684374 (b. 1861) |
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| kathleen prothero Peerage person ID=684373 (b. 1885) |
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| beatrice hope prothero (born 1892) (b. 1892) |
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| cliff prothero organiser of the Labour Party in Wales (1898-1990), GB (b. 1898) |
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donald prothero American paleontologist, geologist, and author, US (b. 1954) |
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| r. mansell prothero British geographer (1924-2013), GB (b. 1924) |
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james havard prothero British archdeacon |
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| gareth prothero Welsh rugby union player, GB (b. 1941) |
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| leslie prothero British painter, GB (b. 1946) |
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| i. j. prothero (b. 1939) |
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